package com.bicycle.rentalsystem.servelt.admin;

/**
 * @author Third uncle
 * @date 2022/11/22 - 14:13
 */
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.lang.reflect.Method;

public class BaseServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        doPost(req,resp);
    }

    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException,
            IOException {
        req.setCharacterEncoding("UTF-8");
        String action = req.getParameter("action");
        try {
// 获取 action 业务鉴别字符串，获取相应的业务 方法反射对象
            Method method = this.getClass().getDeclaredMethod(action, HttpServletRequest.class,
                    HttpServletResponse.class);
// System.out.println(method);
// 调用目标业务 方法
            method.invoke(this, req, resp);
        } catch (Exception e) {
            e.printStackTrace();
            throw new RuntimeException(e);// 把异常抛给 Filter 过滤器
        }
    }
}
